Enantioselective total synthesis and structural reassignment of (+)-alsmaphorazine E via a traceless chirality transfer strategy

Abstract

The first enantioselective total synthesis of (+)-alsmaphorazine E has been achieved through a traceless chirality transfer strategy, which also enabled structural reassignment of the natural product. Key features of this efficient approach entail a catalytic intramolecular oxidative cyclization, a diastereoselective oxidative cyclic aminal formation and a radical cyclization/transannular aza-Michael addition cascade.